A lip shroud for a dragline lip configured to prevent wear on the dragline lip and to prevent decoupling therefrom during operations. The lip shroud comprises of a first sidewall having a first abutment surface provided with an opening; a second sidewall having a second abutment surface wherein the second sidewall has a securing portion configured for coupling to a lock device on the dragline lip; and a center- wall having a third abutment surface, the center wall connecting the first sidewall and the second sidewall wherein the first, second and third abutment surfaces define a channel to receive an edge portion of the dragline lip.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A control system for operating a plurality of generator sets, the control system comprising: a plurality of control units configured to control an operation of a respective one of the plurality of generator sets; a data bus connected to the plurality of control units for transmitting data; a plurality of load bus segments configured to be connected to the respective one of the plurality of generator sets; and at least one tie breaker being arranged between two load bus segments of the plurality of load bus segments to selectively connect the two load bus segments in a closed position and isolate the two load bus segments in an opened position, and the tie breaker being directly connected to at least one of the plurality of control units, wherein the at least one of the plurality of control units is further configured to: receive a first signal from the tie breaker indicative of a position of the tie breaker; and provide the first signal to at least one further control unit of the plurality of control units via the data bus, wherein the control units are configured to allocate a load group number for the respective generator set based on the first signal.
2. The control system of claim 1 , wherein the control units are further configured to receive at least one signal from the at least one further control unit via the data bus, the signal being indicative of a position of a respective tie breaker directly connected to the at least one further control unit.
3. The control system of claim 1 , wherein the control units are configured to operate the respective generator set in a transition operation mode during allocation of the load group number.
4. The control system of claim 1 , wherein the load bus segments are arranged in series in a closed loop.
5. The control system of claim 1 , wherein the at least one tie breaker comprises two or more tie breakers.
6. The control system of claim 1 , wherein the data bus is configured as a CAN Bus.
7. The control system of claim 1 , wherein each generator set comprises an internal combustion engine and a generator, the internal combustion engine being operatively coupled to the respective generator; and the control units are configured as engine control units.
8. The control system of claim 1 , wherein the generator sets include a first generator set, a second generator set, a third generator set, and a fourth generator set, the first generator set and the second generator set are connected to a first load bus segment, the third generator set and the fourth generator set are connected to a second load bus segment, and the at least one tie breaker is arranged between the first load bus segment and the second load bus segment.
9. A method for operating a plurality of generator sets selectively connectable to one another via at least one tie breaker to form load groups, the method comprising: receiving, by a first generator set of the plurality of generator sets, a first signal from a first tie breaker of the at least one tie breaker, the first signal being indicative of a closed position or an opened position of the first tie breaker; providing, by the first generator set, the first signal to at least one further generator set of the plurality of generator sets; receiving, by the at least one further generator set, the first signal from the first generator set; operating the plurality of generator sets based on the first signal receiving, by a second generator set of the plurality of generator sets, a second signal from the first tie breaker, the second signal being indicative of a closed position or an opened position of the first tie breaker; providing, by the second generator set, the second signal to at least one further generator set of the plurality of generator sets; and receiving, by the at least one further generator set, the second signal from the second generator set, wherein the method step of operating the plurality of generator sets is further based on the second signal.
10. The method of claim 9 , wherein the method step of operating the plurality of generator sets comprises: determining that the first signal is unequal to the second signal; and operating at least one of the plurality of generator sets in an emergency operation mode.
11. The method of claim 10 , wherein the emergency operation mode includes operating an engine associated with the respective generator set at a reduced engine speed.
12. The method of claim 9 , further comprising: receiving, by a third generator set of the plurality of generator sets, a third signal from a second tie breaker of the at least one tie breaker, the third signal being indicative of a closed position or opened position of the second tie breaker; providing, by the third generator set, the third signal to at least one further generator set of the plurality of generator sets; and receiving, by the at least one further generator set, the third signal from the third generator set, wherein the method step of operating the plurality of generator sets is further based on the third signal.
13. The method of claim 9 , wherein the method step of operating the plurality of generator sets further comprises: allocating, by each generator set, a load group number for each generator set based on the at least one received signal; and operating the generator sets with the same load group number to share a common load, particularly to equally share the common load.
14. The method of claim 13 , wherein the generator sets with the same load group number share the common load equally.
15. A control system for operating a plurality of generator sets, the control system comprising: a plurality of control units configured to control an operation of a respective one of the plurality of generator sets; a data bus connected to the plurality of control units for transmitting data; a plurality of load bus segments configured to be connected to the respective one of the plurality of generator sets; and at least one tie breaker being arranged between two load bus segments of the plurality of load bus segments to selectively connect the two load bus segments in a closed position and isolate the two load bus segments in an opened position, and the tie breaker being directly connected to at least one of the plurality of control units, wherein the at least one of the plurality of control units is further configured to: receive a first signal from the tie breaker indicative of a position of the tie breaker; provide the first signal to at least one further control unit of the plurality of control units via the data bus, wherein each tie breaker is directly connected to at least two of the control units; determine that the first signal is unequal to a second signal from the at least one tie breaker received via the data bus; and operate the respective generator set in an emergency operation mode.
16. The control system of claim 15 , wherein the emergency operation mode includes operating an engine associated with the respective generator set at a reduced engine speed.
17. The control system of claim 15 , wherein the emergency operation mode includes configuring a first control unit from the control units as a master control unit and remaining control units of the control units as slave control units, wherein the slave control units may be configured to receive instructions from the master control unit.
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July 1, 2015
July 17, 2018
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